diff --git a/Debug/proto/subdir.mk b/Debug/proto/subdir.mk
index b7bea2c..4c1177f 100644
--- a/Debug/proto/subdir.mk
+++ b/Debug/proto/subdir.mk
@@ -20,7 +20,7 @@ C_DEPS += \
 proto/%.o: ../proto/%.c
 	@echo 'Building file: $<'
 	@echo 'Invoking: GCC C Compiler'
-	gcc -I../inc -O0 -g3 -Wall -Wextra -c -fmessage-length=0 -fsanitize=address `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
+	gcc -D_GNU_SOURCE -I../inc -O0 -g3 -Wall -Wextra -c -fmessage-length=0 -fsanitize=address `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
 	@echo 'Finished building: $<'
 	@echo ' '
 
diff --git a/Debug/src/subdir.mk b/Debug/src/subdir.mk
index a795b73..d6d8325 100644
--- a/Debug/src/subdir.mk
+++ b/Debug/src/subdir.mk
@@ -29,7 +29,7 @@ C_DEPS += \
 src/%.o: ../src/%.c
 	@echo 'Building file: $<'
 	@echo 'Invoking: GCC C Compiler'
-	gcc -I../inc -O0 -g3 -Wall -Wextra -c -fmessage-length=0 -fsanitize=address `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
+	gcc -D_GNU_SOURCE -I../inc -O0 -g3 -Wall -Wextra -c -fmessage-length=0 -fsanitize=address `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
 	@echo 'Finished building: $<'
 	@echo ' '
 
diff --git a/Release/proto/subdir.mk b/Release/proto/subdir.mk
index 3668e81..117f385 100644
--- a/Release/proto/subdir.mk
+++ b/Release/proto/subdir.mk
@@ -20,7 +20,7 @@ C_DEPS += \
 proto/%.o: ../proto/%.c
 	@echo 'Building file: $<'
 	@echo 'Invoking: GCC C Compiler'
-	gcc -I../inc -O3 -Wall -Wextra -c -fmessage-length=0 `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
+	gcc -D_GNU_SOURCE -I../inc -O3 -Wall -Wextra -c -fmessage-length=0 `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
 	@echo 'Finished building: $<'
 	@echo ' '
 
diff --git a/Release/src/subdir.mk b/Release/src/subdir.mk
index c8e1c83..2fef766 100644
--- a/Release/src/subdir.mk
+++ b/Release/src/subdir.mk
@@ -29,7 +29,7 @@ C_DEPS += \
 src/%.o: ../src/%.c
 	@echo 'Building file: $<'
 	@echo 'Invoking: GCC C Compiler'
-	gcc -I../inc -O3 -Wall -Wextra -c -fmessage-length=0 `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
+	gcc -D_GNU_SOURCE -I../inc -O3 -Wall -Wextra -c -fmessage-length=0 `pkg-config --cflags gtk+-3.0` -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -o "$@" "$<"
 	@echo 'Finished building: $<'
 	@echo ' '
 
diff --git a/src/wofi.c b/src/wofi.c
index c5d8a27..54c1c7f 100644
--- a/src/wofi.c
+++ b/src/wofi.c
@@ -360,7 +360,7 @@ static gboolean do_filter(GtkListBoxRow* row, gpointer data) {
 	if(filter == NULL || strcmp(filter, "") == 0) {
 		return TRUE;
 	}
-	if(strstr(text, filter) != NULL) {
+	if(strcasestr(text, filter) != NULL) {
 		return TRUE;
 	}
 	return FALSE;