diff --git a/include/libopencm3/cm3/fpb.h b/include/libopencm3/cm3/fpb.h
index fe624da5..805ddbb9 100644
--- a/include/libopencm3/cm3/fpb.h
+++ b/include/libopencm3/cm3/fpb.h
@@ -23,7 +23,7 @@
 /* Cortex-M3 Flash Patch and Breakpoint (FPB) unit */
 
 /* Those defined only on ARMv7 and above */
-#if !defined(__ARM_ARCH_7M__) || !defined(__ARM_ARCH_7EM__)
+#if !defined(__ARM_ARCH_7M__) && !defined(__ARM_ARCH_7EM__)
 #error "Flash Patch and Breakpoint not available in CM0"
 #endif